Results 11 to 20 of about 2,586 (182)

Exergoenvironmental, environmental impact and damage cost analyses of a micro turbojet engine (m-TJE)

Energy Reports, 2022
This study presents a comprehensive investigation of the emission impact, environmental damage cost, exergoenvironmental and life cycle assessment (LCA) analyses of a micro turbojet engine (m-TJE) utilized on Unmanned Air Vehicle (UAV) for four different
Ozgur Balli, Utku Kale, Dániel Rohács, T. Hikmet Karakoc   +3 more
doaj   +3 more sources

Impact of Using Chevrons Nozzle on the Acoustics and Performances of a Micro Turbojet Engine

Applied Sciences, 2021
This paper presents a study regarding the noise reduction of the turbojet engine, in particular the jet noise of a micro turbojet engine. The results of the measurement campaign are presented followed by a performances analysis which is based on the ...
Grigore Cican, Marius Deaconu, Daniel-Eugeniu Crunteanu   +2 more
doaj   +3 more sources

Micro Turbojet Engine Nozzle Ejector Impact on the Acoustic Emission, Thrust Force and Fuel Consumption Analysis

Aerospace, 2023
This paper explores the implementation of an ejector to a micro turbojet engine and analysis of the advantages in terms of acoustic and thrust/fuel consumption.
Grigore Cican, Tiberius-Florian Frigioescu, Daniel-Eugeniu Crunteanu, Laurentiu Cristea   +3 more
doaj   +3 more sources

Sliding Mode Control for Micro Turbojet Engine Using Turbofan Power Ratio as Control Law

Energies, 2020
The interest in turbojet engines was emerging in the past years due to their simplicity. The purpose of this article is to investigate sliding mode control (SMC) for a micro turbojet engine based on an unconventional compound thermodynamic parameter ...
Khaoula Derbel, Károly Beneda
doaj   +3 more sources

Experimental and Numerical Studies on Lobed Ejector Exhaust System for Micro Turbojet Engine [PDF]

Engineering Applications of Computational Fluid Mechanics, 2011
Abstract:For the purpose of improving thrust and cooling the wall of the nozzle on a micro turbojet engine, the aerodynamic characteristics micro lobed ejector, which consists of a lobed nozzle and mixing, is studied using numerical calculations and experiments.
Yong Shan, Jing-zhou Zhang, Guo-ping Huang   +2 more
openaire   +3 more sources

Prediction of performance characteristics of an experimental micro turbojet engine using machine learning approaches

Energy
The continuous growth of the world population leads to an increase in energy demand, which poses challenges to sustainable energy supply. Predicting aviation engine performance according to its own characteristics is very important in ensuring sustainability.
Hakan Aygun, Omer Osman Dursun, Kadir Dönmez, Oguzhan Sahin, Suat Toraman   +4 more
openaire   +4 more sources

High-Speed, Maneuverable, and Terrain-Adaptive Micro-Robot with Tree Frog-Inspired Bionic Feet. [PDF]

Adv Sci (Weinh)
A 7.5 mm micro‐robot integrates tree frog‐inspired bionic feet with an electromagnetic linear motor to achieve high‐speed locomotion, slope climbing, and precise turning. It reaches 39 body lengths per second and ascends 30° slopes. The system demonstrates strong potential for inspection tasks in confined and complex environments, such as micro‐aero ...
Zhao W, Li S, Zhang K, Zhang W, Liu D, Fang W, Zhai Y, Lei K, Zhang L, Chen H, Xu T.   +10 more
europepmc   +2 more sources

Thermodynamics, Environmental and Sustainability Impacts of a Turbofan Engine Under Different Design Conditions Considering Variable Needs in the Aviation Industry. [PDF]

Glob Chall
Thermodynamic analysis is applied to the kerosene fuelled high by‐pass turbofan (HBP‐TF) engine to assess entropy, exergy, environmental and sustainability metrics for different design variables. As a novelty, entropic improvement potential index for turbomachinery components and specific irreversibility production for the whole engine are computed ...
Aygun H, Sheikhi MR, Caliskan H.
europepmc   +2 more sources

Intensification of convective heat exchange of walls of heat pipe of 3D-printed micro-sized turbojet engine [PDF]

Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The article considers the solution of the urgent problem of creating a micro-sized turbojet engine using 3D printing. The article describes one of the ways to cool the walls of the heat pipe of a small combustion chamber made of heat-resistant material
A. V. Pobelyansky, D. K. Dmitriev, A. A. Levikhin   +2 more
doaj   +1 more source

Analysis of possibility of using commercial micro turbojet engines for high-speed small-sized operational-tactical UAVs

Авіаційно-космічна техніка та технологія, 2023
Despite the technological advances that made it possible to create serial commercial micro-turbojet engines with a thrust of up to 1.0 kN, engines of this type in the class of high-speed unmanned aerial vehicles (UAVs) weighing up to 200 kg have not yet ...
Olexander Khrulev
doaj   +1 more source